package com.itheima.reggie.service.impl;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.itheima.reggie.common.CustomException;
import com.itheima.reggie.dto.DishDto;
import com.itheima.reggie.entity.Dish;
import com.itheima.reggie.entity.DishFlavor;
import com.itheima.reggie.mapper.DishMapper;
import com.itheima.reggie.service.DishFlavorService;
import com.itheima.reggie.service.DishService;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.List;
import java.util.stream.Collectors;

@Service
public class DishServiceImpl extends ServiceImpl<DishMapper, Dish> implements DishService {

    @Autowired
    private DishFlavorService dishFlavorService;

    @Override
    public void saveWithFlavor(DishDto dishDto) {
        //1.保存菜品的基本信息到菜品表格中
        this.save(dishDto);
        //2.获取当前保存菜品的 id
        Long id = dishDto.getId();

        //3.菜品口味数据处理
        // 获取所有口味信息
        List<DishFlavor> flavors = dishDto.getFlavors();
//        for (DishFlavor flavor : flavors) {
//            flavor.setDishId(id);
//        }
        flavors = flavors.stream().map((item)-> {
            item.setDishId(id);
            return item;
        }).collect(Collectors.toList());

        System.out.println(flavors);

        dishFlavorService.saveBatch(flavors);


    }


    /**
     * 根据 id 查询菜品信息和对应口味信息
     * @param id
     * @return
     */
    @Override
    public DishDto getByIdWithFlavor(Long id) {
        Dish dish = this.getById(id);

        DishDto dishDto = new DishDto();
        BeanUtils.copyProperties(dish, dishDto);

        LambdaQueryWrapper<DishFlavor> queryWrapper = new LambdaQueryWrapper<>();
        queryWrapper.eq(DishFlavor::getDishId, dish.getId());
        List<DishFlavor> flavors = dishFlavorService.list(queryWrapper);

        dishDto.setFlavors(flavors);

        return dishDto;
    }

    /**
     *  修改菜品和关联口味信息
     * @param dishDto
     */
    @Override
    public void updateWithFlavor(DishDto dishDto) {
        // 更新 dish 表的基本信息
        this.updateById(dishDto);

        // 清理当前菜品对应口味数据
        LambdaQueryWrapper<DishFlavor> queryWrapper =new LambdaQueryWrapper<>();
        queryWrapper.eq(DishFlavor::getDishId, dishDto.getId());
        dishFlavorService.remove(queryWrapper);

        List<DishFlavor> flavors = dishDto.getFlavors();
        flavors = flavors.stream().map((item)->{
            item.setDishId(dishDto.getId());
            return item;
        }).collect(Collectors.toList());

        dishFlavorService.saveBatch(flavors);

    }

    /**
     * 商品状态更改
     * @param ids
     */

    @Transactional
    public void updateStatus(List<Long> ids, int v) {

        LambdaQueryWrapper<Dish> queryWrapper = new LambdaQueryWrapper<>();
        queryWrapper.in(Dish::getId, ids);



        List<Dish> list = this.list(queryWrapper).stream().map((item)->{
            item.setStatus(v);
            return item;
        }).collect(Collectors.toList());

        for (Dish dish : list) {
            this.updateById(dish);
        }


    }

    @Transactional
    public void remove(List<Long> ids) {

        LambdaQueryWrapper<Dish> queryWrapper = new LambdaQueryWrapper<>();
        queryWrapper.in(Dish::getId, ids);
        queryWrapper.eq(Dish::getStatus, 1);

        int cnt = this.count(queryWrapper);
        if (cnt > 0) {
            throw new CustomException("菜品正在售卖中，不能删除");
        }

        this.removeByIds(ids);


    }


}
